Description The crib mobile arm holder is made of plastic, safe and reliable for long time use. Listening to music will help teach your infant about patterns and sequence, and about rhythm, beat and tone which are useful for problem-solving and reasoning. Early music exposure can help promote critical listening skills, language and literacy, creativity and coordination. Features -Color: Silver-Material: Plastic-Size: 27.00X11.00X6.00cm;/10.61X4.32X2.36in;- The baby crib mobile arm bracket replacement is sturdy arm easily attaches to any crib.- The item is made of premium plastic for durable use, safe for baby, practical to use.- Easy to use, you can directly attach it to your baby's crib, and hanging bells or toys over the crib.- It is a baby crib mobile bed bell rack holder for little baby for showing funny and interesting things.- Early music exposure can help promote critical listening skills, language and literacy, creativity and coordination.Packing list: 1 x crib mobile